Improvement in mortising-machine



M. E. CAMPF-IELD.

Mortising Machine.

Pmefedv Jan'y 25, 1870.;

MATTHEW E. CAMPFTELD, 0F NEWARK, NEW JERS EY.

Letters 'Patent No. 99,155, dated January 25, 1870.

IMPROVEMENT IN' MORTISING-MAHINE.

The Schedule referred to iltheae Letters Patent and making part o! thelame.

To all whom 'it may concern:

Be it known that I, MATTHEW E. OAMPFnLn, of the city of Newark, in thecounty of Essex, and State of New Jersey, have made certain Improvementsin Pover Mortising-Machines; and declare the following, taken inconnection with the accompanying drawings, to be a full and exactdescription of the same.

The nature of my improvement consists in the manner .employed to reversethe chisel, and ir adaptation of the parts to that manner.

In the drawings, the same letters refer to the same partsin each figure.

The upright chisel-holding shaft is -in two parts. The upper, a, ishollow. The lower part, b, passing through a, is. at liberty to turntherein when required.

A collar on the top of b, at o, under the crank, and one on b, justbelow the end of a, holds the two, both moving simultaneously with thecrank.

The shaft b passes through the ratch-wheel e, which has a tubularelongation, that is, a journal, revolving in the bearing d on the mainframe.

The vtube projects below the bearing, and has. secured fast to its lowerend, under the bearing, the piece f, between which and the under side ofthe bearing is placed the piece g, slotted, as shown inFigure 3, toslide against the tube upon e, that passes through' it.

There is, upon the shaft b, a feather or tongue, i, sliding in acorresponding groove in the interior of the tube one, to turn the shaftwhen e is turned, and hold it in position wlen mortising. v

The ratch-wheel e has a flange on each side, as seen in Figure 2. Thesefianges are shaped as shown in Figure 5.

A belt, 1:, encirclcs the wheel between the fianges,

vhaving upon it a block, o, or blocks, wider than the belt, to catch inthe rat-ches in the fianges on e.

A foot-treadle, p, fig. 2, has an arm, q, iointed thereto. Atthe top ofthe arm, is the lover If, the fulcrun of the lever being on a level withthat part on f, upon `which g rests and slides.

The end of the lever 7.; passes through the front r of the main frame,entering the notch or recess in the end off, as the foot presses downthe treadle p. As soon as the foot is lifted and the treadle returns toits original position, the end 'of lt rises above f, as shown by dottedlines in fig. 2, and f can pass under k.

A half revolution is produced by the descent of the .weight s on one endof the belt n, which has been sus pended by the block o, on the belt 11,catching in' the ratcl in the flanges of e, and as soon as k releasesthe piece j; on the tube one, f turns and carries the chisel round to astop provided at the half turn needed to have the chisel revrsed. Thepiece g lies loose between the sides tofj; the

tube of e passing through the slot in g. This piece g being made longerthan would allow it to turn past the end of the lever k, at the halfturn, one ofthe projections u, fig. 3, catches against =tle side of kand stops it. A

The end of k is formed cam-fashion, so that in its descent, it pushesgfrom it, so that g could turn past' it, but as it has entered the recessin 'the end off, it is held from turning until k rises above j; andthen, as g has been pushed out at the other end by the cam, at the halfturn, it again stops at the side of k.

The treadle lifting the weight s, the belt a having a smallcounterbalance on the opposite end, on which is the weight s, pulls theblock o into the catch on e, and

the weight s remains suspended un til f is released, when it of courseturns the sha-ft and chisel.

By this arrangement, the chisel is held steady to its place until thepiece is mortised to its proper depth, and the mortised piece descendsbelow and clear of the chisel then the chisel immediately reverses.

The adjustable table is attached to and moved by the arm q on thetrcadle p.

fhat I claim as my im provemcnts, are- 1. The ratch-wheel e, fiexiblecatch n o, when con-

